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<h3 id="简单的Express服务"><a href="#简单的Express服务" class="headerlink" title="简单的Express服务"></a>简单的Express服务</h3><h4 id="Supervisor热启动Node服务"><a href="#Supervisor热启动Node服务" class="headerlink" title="Supervisor热启动Node服务"></a>Supervisor热启动Node服务</h4><ul>
<li>全局安装: npm install supervisor -g</li>
<li>supervisor app.js 来启动app</li>
</ul>
<h4 id="Express服务"><a href="#Express服务" class="headerlink" title="Express服务"></a>Express服务</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line">// 简单的Express服务</span><br><span class="line">var express = require(&apos;express&apos;);</span><br><span class="line">var app = express();</span><br><span class="line"></span><br><span class="line">// 设置一个静态文件夹</span><br><span class="line">app.use(express.static(&apos;public&apos;));</span><br><span class="line"></span><br><span class="line">app.get(&apos;/&apos;, function(req, res) &#123;</span><br><span class="line">  // 接收get请求的参数(&#123; name: test &#125;), http://localhost:8081/?name=test</span><br><span class="line">  console.log(req.query);</span><br><span class="line">  res.json(&#123;id: &apos;hello ddrr&apos;&#125;);</span><br><span class="line">&#125;);</span><br><span class="line"></span><br><span class="line">var server = app.listen(8081, function()&#123;</span><br><span class="line">  console.log(&apos;启动成功&apos;);</span><br><span class="line">&#125;);</span><br></pre></td></tr></table></figure>

<h3 id="Express中间件"><a href="#Express中间件" class="headerlink" title="Express中间件"></a>Express中间件</h3><p>Express是一个路由和中间件 Web 框架, 其自身只具有最低程度的功能. Express应用程序基本上是一系列中间件函数调用</p>
<ul>
<li>中间件函数可以执行以下任务:<ul>
<li>执行任何代码</li>
<li>对请求和响应对象进行更改</li>
<li>结束请求/响应循环</li>
<li>调用堆栈中的下一个中间件函数</li>
</ul>
</li>
<li>如果当前中间件函数没有结束请求/响应循环, 那么它必须调用next(), 以将控制权传递给下一个中间件函数. 否则, 请求将保持挂起状态</li>
</ul>
<h4 id="应用层中间件"><a href="#应用层中间件" class="headerlink" title="应用层中间件"></a>应用层中间件</h4><p>使用app.use()和app.METHOD()函数将应用层中间件绑定到应用程序对象的实例, 其中METHOD是中间件函数处理的请求的小写HTTP方法(例如 GET、PUT 或 POST)</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">var app = express();</span><br><span class="line"></span><br><span class="line">// 此示例显示安装在/user/:id路径中的中间件函数, 在/user/:id路径中为任何类型的HTTP请求执行此函数</span><br><span class="line">app.use(&apos;/user/:id&apos;, function (req, res, next) &#123;</span><br><span class="line">  console.log(&apos;Request Type:&apos;, req.method);</span><br><span class="line">  next();</span><br><span class="line">&#125;);</span><br><span class="line"></span><br><span class="line">// 此示例显示一个路由及其处理程序函数(中间件系统),此函数处理针对/user/:id路径的GET请求</span><br><span class="line">app.get(&apos;/user/:id&apos;, function (req, res, next) &#123;</span><br><span class="line">  res.send(&apos;USER&apos;);</span><br><span class="line">&#125;);</span><br></pre></td></tr></table></figure>

<h4 id="路由器层中间件"><a href="#路由器层中间件" class="headerlink" title="路由器层中间件"></a>路由器层中间件</h4><p>路由器层中间件的工作方式与应用层中间件基本相同, 差异之处在于它绑定到express.Router()的实例</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line">var app = express();</span><br><span class="line">var router = express.Router();</span><br><span class="line"></span><br><span class="line">router.use(function (req, res, next) &#123;</span><br><span class="line">  console.log(&apos;Time:&apos;, Date.now());</span><br><span class="line">  next();</span><br><span class="line">&#125;);</span><br><span class="line"></span><br><span class="line">router.use(&apos;/user/:id&apos;, function(req, res, next) &#123;</span><br><span class="line">  console.log(&apos;Request URL:&apos;, req.originalUrl);</span><br><span class="line">  next();</span><br><span class="line">&#125;, function (req, res, next) &#123;</span><br><span class="line">  console.log(&apos;Request Type:&apos;, req.method);</span><br><span class="line">  next();</span><br><span class="line">&#125;);</span><br><span class="line"></span><br><span class="line">router.get(&apos;/user/:id&apos;, function (req, res, next) &#123;</span><br><span class="line">  console.log(req.params.id);</span><br><span class="line">  res.render(&apos;special&apos;);</span><br><span class="line">&#125;);</span><br><span class="line"></span><br><span class="line">app.use(&apos;/&apos;, router);</span><br></pre></td></tr></table></figure>

<h4 id="错误处理中间件"><a href="#错误处理中间件" class="headerlink" title="错误处理中间件"></a>错误处理中间件</h4><p>错误处理中间件函数的定义方式与其他中间件函数基本相同, 差别在于错误处理函数有四个自变量而不是三个, 专门具有特征符 (err, req, res, next)</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">app.use(function(err, req, res, next) &#123;</span><br><span class="line">  console.error(err.stack);</span><br><span class="line">  res.status(500).send(&apos;Something broke!&apos;);</span><br><span class="line">&#125;);</span><br></pre></td></tr></table></figure>

<h4 id="内置中间件"><a href="#内置中间件" class="headerlink" title="内置中间件"></a>内置中间件</h4><p>express.static是express内唯一内置的中间件函数, express.static(root, [options]), 负责提供Express应用程序的静态资源</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">var options = &#123;</span><br><span class="line">  dotfiles: &apos;ignore&apos;,</span><br><span class="line">  etag: false,</span><br><span class="line">  extensions: [&apos;htm&apos;, &apos;html&apos;],</span><br><span class="line">  index: false,</span><br><span class="line">  maxAge: &apos;1d&apos;,</span><br><span class="line">  redirect: false,</span><br><span class="line">  setHeaders: function (res, path, stat) &#123;</span><br><span class="line">    res.set(&apos;x-timestamp&apos;, Date.now());</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">app.use(express.static(&apos;public&apos;, options));</span><br></pre></td></tr></table></figure>

<h4 id="第三方中间件"><a href="#第三方中间件" class="headerlink" title="第三方中间件"></a>第三方中间件</h4><p>使用第三方中间件向Express应用程序添加功能</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">var express = require(&apos;express&apos;);</span><br><span class="line">var app = express();</span><br><span class="line">var cookieParser = require(&apos;cookie-parser&apos;);</span><br><span class="line"></span><br><span class="line">// 加载cookie-parsing中间件</span><br><span class="line">app.use(cookieParser());</span><br><span class="line"></span><br><span class="line">app.use(&apos;/&apos;, function(req, res, next) &#123;</span><br><span class="line">  console.log(req.cookies);</span><br><span class="line">  res.send(&apos;success&apos;);</span><br><span class="line">&#125;);</span><br></pre></td></tr></table></figure>

<h3 id="Express路由"><a href="#Express路由" class="headerlink" title="Express路由"></a>Express路由</h3><p>路由是指根据不同的url分配到对应的路由处理程序(函数)<br><a href="https://expressjs.com/zh-cn/guide/routing.html" target="_blank" rel="noopener">官方路由教程</a></p>
<h3 id="错误处理"><a href="#错误处理" class="headerlink" title="错误处理"></a>错误处理</h3><p>错误处理中间件函数的定义方式与其他中间件函数基本相同, 差别在于错误处理函数有四个自变量而不是三个: (serr, req, res, next)<br><a href="https://expressjs.com/zh-cn/guide/error-handling.html" target="_blank" rel="noopener">官方错误处理教程</a></p>
<h3 id="模板引擎-Swig"><a href="#模板引擎-Swig" class="headerlink" title="模板引擎(Swig)"></a>模板引擎(Swig)</h3><p>Swig是一个node.js和浏览器端的Javascript模板引擎</p>
<ul>
<li><a href="http://node-swig.github.io/swig-templates/docs/" target="_blank" rel="noopener">swig官网</a></li>
<li>npm install swing –save</li>
</ul>
<p>app.js文件</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br></pre></td><td class="code"><pre><span class="line">var express = require(&apos;express&apos;);</span><br><span class="line">var swig = require(&apos;swig&apos;); </span><br><span class="line">var app = express();</span><br><span class="line"> </span><br><span class="line">// 设置swig页面不缓存</span><br><span class="line">swig.setDefaults(&#123;</span><br><span class="line">  cache: false</span><br><span class="line">&#125;)</span><br><span class="line">app.set(&apos;view cache&apos;, false);</span><br><span class="line"> </span><br><span class="line">// 设置页面的位置, views文件夹下的index</span><br><span class="line">app.set(&apos;views&apos;, &apos;./views/&apos;);</span><br><span class="line">app.set(&apos;view engine&apos;,&apos;html&apos;);</span><br><span class="line">app.engine(&apos;html&apos;, swig.renderFile);</span><br><span class="line"> </span><br><span class="line">app.listen(4001);</span><br><span class="line"> </span><br><span class="line">console.log(&apos;server starts&apos;);</span><br><span class="line"> </span><br><span class="line">//index page</span><br><span class="line">app.get(&apos;/&apos;, function(req, res)&#123;</span><br><span class="line">  res.render(&apos;index&apos;, &#123;</span><br><span class="line">    title: &apos;首页&apos;,</span><br><span class="line">    content: &apos;hello swig&apos;</span><br><span class="line">  &#125;)</span><br><span class="line">&#125;)</span><br></pre></td></tr></table></figure>

<p>html文件</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">&lt;!DOCTYPE html&gt;</span><br><span class="line">&lt;html lang=&quot;en&quot;&gt;</span><br><span class="line">&lt;head&gt;</span><br><span class="line">  &lt;meta charset=&quot;UTF-8&quot;&gt;</span><br><span class="line">  &lt;title&gt;&#123;&#123; title &#125;&#125;&lt;/title&gt;</span><br><span class="line">&lt;/head&gt;</span><br><span class="line">&lt;body&gt;</span><br><span class="line">  &#123;&#123; content &#125;&#125;</span><br><span class="line">&lt;/body&gt;</span><br><span class="line">&lt;/html&gt;</span><br></pre></td></tr></table></figure>

<h3 id="脚手架"><a href="#脚手架" class="headerlink" title="脚手架"></a>脚手架</h3><p>express-generator可以快速创建一个应用的骨架</p>
<h4 id="全局安装-express-generator"><a href="#全局安装-express-generator" class="headerlink" title="全局安装(express-generator)"></a>全局安装(express-generator)</h4><ul>
<li>npm install express-generator -g</li>
</ul>
<h4 id="参数列表"><a href="#参数列表" class="headerlink" title="参数列表"></a>参数列表</h4><ul>
<li>express -h<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">Options:</span><br><span class="line">  -h, --help          输出使用方法</span><br><span class="line">      --version       输出版本号</span><br><span class="line">  -e, --ejs           添加对 ejs 模板引擎的支持</span><br><span class="line">      --hbs           添加对 handlebars 模板引擎的支持</span><br><span class="line">      --pug           添加对 pug 模板引擎的支持</span><br><span class="line">  -H, --hogan         添加对 hogan.js 模板引擎的支持</span><br><span class="line">      --no-view       创建不带视图引擎的项目</span><br><span class="line">  -v, --view &lt;engine&gt; 添加对视图引擎（view） &lt;engine&gt; 的支持 (ejs|hbs|hjs|jade|pug|twig|vash) （默认是 jade 模板引擎）</span><br><span class="line">  -c, --css &lt;engine&gt;  添加样式表引擎 &lt;engine&gt; 的支持 (less|stylus|compass|sass) （默认是普通的 css 文件）</span><br><span class="line">      --git           添加 .gitignore</span><br><span class="line">  -f, --force         强制在非空目录下创建</span><br></pre></td></tr></table></figure>

</li>
</ul>
<h4 id="初始化项目"><a href="#初始化项目" class="headerlink" title="初始化项目"></a>初始化项目</h4><ul>
<li>express testProject</li>
</ul>
<h4 id="启动项目"><a href="#启动项目" class="headerlink" title="启动项目"></a>启动项目</h4><p>配置package.json的start</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">&quot;scripts&quot;: &#123;</span><br><span class="line">  &quot;start&quot;: &quot;supervisor ./bin/www&quot;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h3 id="参考资料"><a href="#参考资料" class="headerlink" title="参考资料"></a>参考资料</h3><p><a href="https://expressjs.com/zh-cn/" target="_blank" rel="noopener">Express官方文档</a><br><a href="http://www.hcoder.net/tutorials/info_1247.html" target="_blank" rel="noopener">Swig模板引擎快速入门</a><br><a href="https://www.cnblogs.com/elementstorm/p/3142644.html" target="_blank" rel="noopener">Swing使用指南</a></p>

      
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              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-3"><a class="nav-link" href="#简单的Express服务"><span class="nav-number">1.</span> <span class="nav-text">简单的Express服务</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#Supervisor热启动Node服务"><span class="nav-number">1.1.</span> <span class="nav-text">Supervisor热启动Node服务</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#Express服务"><span class="nav-number">1.2.</span> <span class="nav-text">Express服务</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Express中间件"><span class="nav-number">2.</span> <span class="nav-text">Express中间件</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#应用层中间件"><span class="nav-number">2.1.</span> <span class="nav-text">应用层中间件</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#路由器层中间件"><span class="nav-number">2.2.</span> <span class="nav-text">路由器层中间件</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#错误处理中间件"><span class="nav-number">2.3.</span> <span class="nav-text">错误处理中间件</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#内置中间件"><span class="nav-number">2.4.</span> <span class="nav-text">内置中间件</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#第三方中间件"><span class="nav-number">2.5.</span> <span class="nav-text">第三方中间件</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Express路由"><span class="nav-number">3.</span> <span class="nav-text">Express路由</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#错误处理"><span class="nav-number">4.</span> <span class="nav-text">错误处理</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#模板引擎-Swig"><span class="nav-number">5.</span> <span class="nav-text">模板引擎(Swig)</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#脚手架"><span class="nav-number">6.</span> <span class="nav-text">脚手架</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#全局安装-express-generator"><span class="nav-number">6.1.</span> <span class="nav-text">全局安装(express-generator)</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#参数列表"><span class="nav-number">6.2.</span> <span class="nav-text">参数列表</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#初始化项目"><span class="nav-number">6.3.</span> <span class="nav-text">初始化项目</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#启动项目"><span class="nav-number">6.4.</span> <span class="nav-text">启动项目</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#参考资料"><span class="nav-number">7.</span> <span class="nav-text">参考资料</span></a></li></ol></div>
            

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                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
  </script>





  

  

  

  
  

  

  

  

</body>
</html>
